London Protocol

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Neuchâtel crisis

...insurrection established a republic there. Frederick William IV of Prussia, preoccupied with his kingdom’s troubles, could take no effective counteraction at the time. Four years later, in the
London Protocol of 1852, the other Great Powers formally acknowledged his rights in Neuchâtel, but with the proviso that Prussia should do nothing to assert them without their concurrence. In...

Schleswig-Holstein

...army drove Denmark’s troops from Schleswig-Holstein. This war between Denmark and Prussia lasted three years (1848–50) and ended only when the great powers pressured Prussia into accepting the
London Protocol of 1852. Under the terms of this peace agreement, the German Confederation returned Schleswig-Holstein to Denmark. In an agreement with Prussia under the 1852 protocol, the Danish...